Non-erasable magnetic identification media

a magnetic identification and non-erasable technology, applied in the field of magnetic storage media, to achieve the effect of adding a level of security, eliminating accidental erasure of stored data, and high security
US20080102320A1Inactive Publication Date: 2008-05-01EDELSTEIN ALAN S +1
21 Cites 10 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
EDELSTEIN ALAN S
Publication Date
2008-05-01
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A magnetic storage medium and method of manufacturing the same comprises a substrate, a magnetic material adjacent to the substrate, and regions of variable magnetic permeability in the magnetic material, wherein the magnetic material may comprise a multilayered structure. Moreover, methods are described for making two kinds of media, read only and read / write media. Additionally, the magnetic material comprises any of permalloy, metallic glass, copper, nickel, iron, cobalt, boron, silicon and any combination thereof, and the magnetic material is approximately 10 to 1,000 nm thick. The regions of variable magnetic permeability comprise regions having a lower permeability than other regions, wherein the regions having a lower permeability than other regions is crystalline, and the regions having a higher permeability can be either crystalline or amorphous, and wherein the areas of lower and higher permeability are dimensioned and configured to be approximately 1 to 20 microns in size.
Need to check novelty before this filing date? Find Prior Art

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This is a continuation-in-part application of pending application Ser. No. 10 / 824,396 filed Apr. 15, 2004.STATEMENT OF GOVERNMENT INTEREST

[0002] The invention described herein may be manufactured, used, and / or licensed by or for the United States Government. BACKGROUND OF THE INVENTION

[0003] The present invention generally relates to magnetic storage media, and more particularly to read / rewrite magnetic storage media capable of withstanding deleterious effects due to exposure from a magnetic field. DESCRIPTION OF THE RELATED ART

[0004] Currently, magnetic information stored on a credit card stripe, debit card stripe, magnetic tape, or hard drive media is stored by maintaining the direction of magnetization in localized areas. Unfortunately, this information is susceptible to being altered or even completely erased if the storage media (credit card stripe, debit card stripe, etc.) is exposed to a magnetic field that is large enough to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More